Steam-generator.



L. E. CUNNELLY. STEAM GENERATUR. APPLICATION man oer. la. 19w.

Patented Mary 21, 1918.

l hogs and t5 com UNITED STATES PATENT OFFICE.

LAWRENCE E. CONNELLY, OF CLEVELAND, OHIO. STEAM-GENERATOR.

Specification of Letters Patent.

Patented May 21, 1918.

Application filed October 15, 1917. Serial No. 196,850.

To all whom it may concern:

Be it known that I, LAWRENCE E. CON- NELLY, a citizen of the United States, residmg at Cleveland, in the county of Guya- State of Ohio, have invented certam new and useful Improvements, in Steam-Generators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, ref erence being had to the accompanying drawings and to the letters of reference marked t ereon, forming part of this specification.

My invention relates to steam generators and particularly to that class of steam generators known as water tube generators.

The objects of my invention are to so construct a water tube steam generator that the steam may be withdrawn from a drum in which the water is still, and also in such a manner that the water tubes which are exposed to the direct action of the heat are straight.

In my im roved generator I provide a pair of box-l1 e tube headers which are connected by the main series of water tubes, the said headers being so arranged that the tubes are inclined tion of the flow of water therethrough. Transversely above the intermediate tion of said tubes is a steam-liberating drum, which is directly connected with the upper portion of each header by means of series of water tubes, and above the lower header I place a feed-water receiving drum, -which is connected with said lower header by means of water steam-liberating drum by means of a series of steam conveying tubes.

These and other features of my invention are fully described and pointed out hereinafter, and are illustrated in the acan ing drawings, in which T e gure is a vertical central section of a steam generator embodying my invention.

In this drawing A and A headers, the header A being placed higher D In the setting than the header A. and both headers being inclined forwardly so that the series of straight water tubes 3 will be at right angles thereto. The outer plate 6 of each header is provided with openings I o to the ends of the water tubes m which access can be he. hereto;

tubes, and with said 7 indicate box- B. header A which openings are closed with screw plu or 1n any other manner which may e deemed more desirable.

Above the tubes B a transverse steam- '00 liberating drum C, which 15 connected to the header A by means of a series D of steam and water conveying tubes; and said drunr is also connected with the by means of a series D of dow'nflow water tubes.

In front header A, I

of the drum C, and over the place another drum E, which is connected with the header A by means of downflow water tubes e, and also is con nected with the drum by means of a series of steam conveying tubes. E indicates a sam-line connection which communicates with the drum E. E indicates a feedwater pipe by means of which feed-water is supplied to the drum E, and thence through the downflow tubes e to the header G'indicates the smoke exit from the boiler setting, and G indicates the cover thereof.

Il'nder the header A I place a small mudreceiving drum H which is connected therewith by means of a series of tubes 7:. and said mud drum is provided with a blowofi tube and valve It. J indicates the furnace chamber above the fire grate J. K, K K K and K are baflle Walls so an ranged as to cause the fire-gas in its hottest state to impinge upon the water tubes B at that portion thereof wherein the upwardly flowing water is the hottest; and thereafter, as the fire-gas becomes reduced in temperature. it impinges with portions of said tubes wherein the water is of lower temperature. This is a very desirable feature in a steam generator because the-higher the degree of heat within the tubes, the higher must be the heat on the outside of the tube to effect a transfer of heat from the outside to the inside of such tubes.

In operation the generator is filler] until the water reaches the level indicated by the broken line x-na; then as the Water becon'tes heated, it flows upwardly through the tubes and tubes D into the drum C wherein steam is liberated and flows therefrom through the series F of steam convey ing tubes into the feed-water receiving drum from whence it is withdrawn for use through the connection E.

at dried out some of tubes F 18 somew header A The sterlm, during its passage through the to secure by Letie s by reason of eaidtnhes being located in a sortof oven space between the drums C and E, through which the fire-gas asses prior to reaching the. smoke exit G. be residue of Water which'does not turn to steam in the drum 0 flowsidownwardl therefrom through the series of tubes into the header A, The supply of water in the generator is kept replenished through the feedwater supply pipe E and drum E. It will thus be seen that the steam from my improved generator is withdrawn from the feed-water receiving drum. wherein there is little or no agitation, after said steam has been piirtially dried during its passage throu the tubes F. It will also be observed that in this form of construction I can use straight tubes where the furnace heat is most intense, and that said tubes are easy of access and can be easily repaired should occasion therefor arise.

Having thus fully shown and described my invention so as to enable others to utilize the same, what I. claim as new and desire nt, is:--

1. In a steam gem'rawr of the class described a air of box-like headers, one of which is p need at a higher elevation than the other, series of inclined water tubes connecting said headers, a transverse steam liberating drum above said inclined tube, a series of steam and water conveying tubes connecting the upper portion of the higher of said headers with said drum, and a series of down-flow water tubes connecting the and lower header substantially as set lower portion of said drum with the upper portion of the lower header, another transverse steam and feed-water recpiving drum over the lower header, means to connect the said steam and feed-water receiving drum with said lower header, and a series of steam conveying tubes connecting the upper portions of said; steam liberating drum and said steam and feed-water receiving drum, substantially as set forth.

2. In a steam generator of the class de scribed, a box-like header at the front thereof, another box-like header at the rear thereof and at a higher elevation, a series of inclined tubes connecting said headers, a transverse steam liberating drum located over the intermediate portion of said inclined tubes, a series of steam and water-conveying tubes connecting the upper portion of said rear and higher header with said steam liberating drum, a series of down-flow water tubes connecting the lower portion of said liberating drum with the upper portion of said front and lower header, a gteam and feed- Water receiving drum located on the line of the water level of said generator and above said front and lower header, a series of steam conveying tubes connecting the upper portions of said liberating drum and said steam and feed-water receiving drum, and

means to connect the lower portion of said steam and feed-water drum with said front forth.

In testimony w ereof I aifix my si ature.

LAWRENCE E. CONN LY. 

